Difference between revisions of "ZMean2Estimate Command"
From GeoGebra Manual
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: Calculates a Z confidence interval estimate of the difference between two population means using the given sample data sets, population standard deviations and confidence ''Level''. | : Calculates a Z confidence interval estimate of the difference between two population means using the given sample data sets, population standard deviations and confidence ''Level''. | ||
:Results are returned in list form as {lower confidence limit, upper confidence limit}. | :Results are returned in list form as {lower confidence limit, upper confidence limit}. | ||
+ | :{{example|1=<div> Two sample data <code><nowiki>list1 = {1, 4, 5, 4, 1, 3, 4, 2}</nowiki></code>, <code><nowiki>list2 = {2, 1, 3, 1, 2, 5, 2, 4}</nowiki></code> are given. The standard deviation of list1 is <code><nowiki>σ_1 = sqrt(2)</nowiki></code>, the standard deviation of list2 is <code><nowiki>σ_2 =sqrt(1.75)</nowiki></code> and the confidence level is 0.75. | ||
+ | ::<code><nowiki>ZMean2Estimate[list1, list2, σ_1, σ_2, 0.75]</nowiki></code> yields ''list3={-1.73, 2.73}''.</div>}} | ||
;ZMean2Estimate[ <Sample Mean 1 >, <Population Standard Deviation σ1 >, <Sample Size 1>, <Sample Mean 2 >, <Population Standard Deviation σ2 >, <Sample Size 2>, <Level>] | ;ZMean2Estimate[ <Sample Mean 1 >, <Population Standard Deviation σ1 >, <Sample Size 1>, <Sample Mean 2 >, <Population Standard Deviation σ2 >, <Sample Size 2>, <Level>] | ||
: Calculates a Z confidence interval estimate of the difference between two population means using the given sample means, population standard deviations and confidence ''Level''. | : Calculates a Z confidence interval estimate of the difference between two population means using the given sample means, population standard deviations and confidence ''Level''. | ||
:Results are returned in list form as {lower confidence limit, upper confidence limit}. | :Results are returned in list form as {lower confidence limit, upper confidence limit}. |
Revision as of 13:13, 19 December 2012
This page is about a feature that is supported only in GeoGebra 4.2. |
- ZMean2Estimate[ <List of Sample Data 1>, <List of Sample Data 2>, <Population Standard Deviation σ1 >, <Population Standard Deviation σ2 >, <Level> ]
- Calculates a Z confidence interval estimate of the difference between two population means using the given sample data sets, population standard deviations and confidence Level.
- Results are returned in list form as {lower confidence limit, upper confidence limit}.
- Example:Two sample data
list1 = {1, 4, 5, 4, 1, 3, 4, 2}
,list2 = {2, 1, 3, 1, 2, 5, 2, 4}
are given. The standard deviation of list1 isσ_1 = sqrt(2)
, the standard deviation of list2 isσ_2 =sqrt(1.75)
and the confidence level is 0.75.ZMean2Estimate[list1, list2, σ_1, σ_2, 0.75]
yields list3={-1.73, 2.73}.
- ZMean2Estimate[ <Sample Mean 1 >, <Population Standard Deviation σ1 >, <Sample Size 1>, <Sample Mean 2 >, <Population Standard Deviation σ2 >, <Sample Size 2>, <Level>]
- Calculates a Z confidence interval estimate of the difference between two population means using the given sample means, population standard deviations and confidence Level.
- Results are returned in list form as {lower confidence limit, upper confidence limit}.